Automatic stop for winding machines



June 26, 1951 w. c. CAIN ETAL 2,557,938

AUTOMATIC STOP FOR WINDING MACHINES Filed Oct. 10, 1949 2 Sheets-Sheet I INVENTORS Wafiain ATTORNEYS Patented June 26, 1951 UNITED STATES PATENT OFFICE AUTOMATIC STOP FOR WINDING MACHINES Willie C. Cain and Richard P. Hester, Bladenboro, N. 0.

Application October 10, 1949, Serial No. 120,566

2 Claims. 1 This invention relates to Winding machines.

In winding machin s of the type disclosed in Patent No. 1,993,910 issued March 12, 1935, and Patent No. 2,230,992 issued February 11, 1941, the thread which is being wound on a spindle passes through a traversing thread guide, and the spindle is carried by a package arm having means to engage the traction shaft to rotate the spindle. The package arm is carried by a movable carriage which moves along a guide rail, and the package arm which is spring-pressed to an inoperative position is normally held in operative relation with respect to the traction shaft by means of the combined force of a second spring and the drag or tension exerted on the thread. When the thread breaks, the second spring is not sufiiciently strong to hold the package arm downwardly to operative position, so that the package will rise and the spindle will stop rotating, whereas the shaft for the traverse guide will continue to move lengthwise of the carriage. When the thread ends have been connected together the traverse guide will be in a position different from its position at the time the thread broke, thereby resulting in an uneven winding on the spindle.

It is, therefore, an object of this invention to provide a simple means in combination or as an attachment whereby the traverse guide will be automatically stopped with the stoppage of the rotation of the spindle at the time the thread breaks.

Another object of this invention is to provide an automatic stop attachment of this kind which can be easily and quickly applied to the winder carriage and will be automatically operative.

A further object of this invention is to provide an attachment of this kind which is simple in construction so that it can be produced at small cost and applied to the present constructions of winders of the type hereinbefore set forth.

With the above and other objects in view, our

invention consists in' the arrangement, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claims.

In the drawing:

Figure 1 is a fragmentary front elevation of a portion of a winding machine having a stop means mounted thereon constructed according to an embodiment of this invention,

Figure 2 is a fragmentary sectional view taken on the line 22 of Figure 1,

Figure 3 is a fragmentary sectional view taken on the line 33 of Figure 2,

Figure 4 is a fragmentary sectional view taken on the line 44 of either Figures 2 or 3,

Figure 5 is a detail side elevation, partly broken away and in section, of the stop attachment.

Referring to the drawings, the numeral l0 designates generally a rail upon which a windii carriage generally designated as H is movably mounted. A traction shaft 12 is disposed above the rail 19, being continuously rotatable and the carriage ll includes a friction roller 53 mounted on a shaft it which is connected with a thread traverse guide !5.

The carriage It includes upper rollers I 6 engaging the upper edge of the rail l0, and also includes inner rollers I! engaging the inner side of the rail 59, in addition to an intermediate roller 18 which is mounted on a spring-pressed lever arm 19.

The carriage II also includes a package arm 29 on the outer end of which is mounted a spindle 21' which frictionally engages the traction shaft l2. The package arm 29 is spring-pressed or biased upwardly to a released position with respect to the spindle 2i and the traction shaft I2, but is normally urged downwardly to hold the spindle 2! against the traction shaft l2 by means of. an elongated bowed spring 22. The spring 22 engages a roller 23 which is carried by a triangular lever 24', pivotally sup-ported from the lower portion of the carriage I I, and the triangular lever 24 is connected with the package arm 20 by means of an elongated connectingv link or rod 25.

The spring 22 is of a tension less than the spring tension which urges the package arm 20 upwardly to inoperative positiombut the tension of spring 22 is such that When the thread which is passing through the guide 15 is normal or unbroken, the torsional strain on the thread and the tension of spring 22 are sufficient to overcome the tension of the spring on arm 20.

The structure hereinbefore described is conventional in winding, machines and is more fully described in Patents Nos. 1,993,910 and 2,230,992 supra.

In order to provide a means whereby the car riage l I may be laterally shifted with respect to the rail 19 so as to disengage the friction roller l3 from the traction shaft 12 and thereby stop traverse of the thread guide i5, we have provided a cam member 26 which is disposed beneath the carriage H in a position to be engaged by the spring 22. The cam 26 is fixed to a slide rod 2? which is slidable through an opening 28 formed in a depending member 29 which forms a part of 3 the present carriage structure. The slide rod 21 projects forwardly in the direction of the rail H) and has mounted on the inner end thereof a roller 30.

The cam 26 includes an outwardly projecting extension 8| and a right angle extension 32 which provides a means whereby the spring 22 will be held against twisting or lateral movement with respect to the cam 26. In certain instances the securing bolts 33 for the spring 22 become loose and in such an instance the spring 22 may have some lateral movement. However, with a stop or guard 32 which is spaced from the sloping side of the cam 26, the sprin 22 will not ride off from the cam at the time the spring 22 is flexed upwardly by upward rocking of the triangular lever 24.

In the use and operation of this device, the normal winding position of package arm 20 is as shown in Figure 2. At this time the torsional strain or pull on the thread which is being wound on the spindle 2|, plus the tension of spring 22, will be sufiicient to overcome the spring tension on package arm 2! which normally urges this arm upwardly to inoperative position. So long as the thread passing through the guide 15 is unbroken, the thread traverse stop means, including the cam 26 and the roller 30, will be inoperative. When the thread breaks the pulling strain on the thread will be eliminated so that the rail I8 so that friction roller l3 will be disengaged from traction shaft l2. When the thread has been tied and a pulling strain is again exerted on the thread, this pulling strain plus the tension of spring 22 will overcome the tension on arm 29 so that arm 20 will be swung downwardly to operative position.

The carriage stop means hereinbefore described can be readily mounted on the present structure of a winding machine, it only being necessary to drill a hole 28 through the depending plate 29 which is part of the present carriage structure. The slide rod 21 is then passed through the opening 28 and the roller 38 attached to the forward end of the rod 21.

We do not mean to confine ourselves to the exact details of construction herein disclosed, but claim all variations falling within the purview of the appended claims.

What we claim is:

1. In combination a thread winding carriage, a rail supporting said carriage, a rotatable traction shaft, a spring-pressed package arm carried by said carriage normally biased to inoperative position with respect to said shaft, a rock lever carried by said carriage and connected with said arm, a second spring engaging said lever constantly urging the latter to rock downwardly to hold said package arm in operative relation with respect to said shaft, said latter spring being of less strength than the spring biasing said arm to inoperative position, a thread traverse guide movably carried by said carriage, a friction wheel connected with said thread guide and engageable with said shaft, the normal pull of the thread passing through said guide and the tension of said second spring overcoming the spring tension of said arm to thereby hold said arm in operative relation relative to said shaft, a depending flange carried by said carriage in confronting position to said rail and having an opening, a cam disposed beneath said carriage in a position to engage said second spring when the latter is moved upwardly by rocking of said lever at the time the thread breaks, a guide rod fixed to said cam and slidably engaging through said opening, a roller carried by said guide rod engageable with said rail adapted to shift said carriage laterally and disengage said friction wheel from said shaft an inverted L-shaped guard carried by said cam for holding said second spring from disengagement from said cam.

2. In a thread Winding carriage movably mounted on a guide rail and havin a friction wheel engaging a traction shaft for moving the thread traversing guide lengthwise of said carriage, said carriage including a spring-pressed package arm normally biased away from said shaft, and a second spring correlated with the pull on the thread through said traversing guide for holding said arm in operative relation with respect to said shaft; a stop attachment active upon breaking of the thread and raising of said arm from said shaft to laterally shift the carriage to disengage the wheel from said shaft, said attachment comprising a cam member, a slide rod fixed to said cam slidably engaging said carriage, a roller on said rod engageable with said rail, said cam being disposed in a position to be engaged by said second spring an inverted L- shaped guard carried by said cam for holding said second spring from disengagement with said cam.

WILLIE C. CAIN. RICHARD P. HESTER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,022,004 Schweiter Apr. 2, 1912 FOREIGN PATENTS Number Country Date 18,531 Great Britain of 1907 

